Part numbering

M87C257

20/22

6

Part numbering

For a list of available options (Speed, Package, etc...) or for further information on any

aspect of this device, please contact the STMicroelectronics Sales Office nearest to you.

Table 14.

Ordering information scheme

Example:

M87C257

-70

X

C

1

X

Device Type

M87

Supply Voltage

C = 5V

Device Function

257 = 256 Kbit (32Kb x 8)

Speed

1.

High Speed, see AC Characteristics section for further information.

-60 = 60ns

-70 = 70 ns

-80 = 80 ns

-90 = 90 ns

-10 = 100 ns

-12 = 120 ns

-15 = 150 ns

-20 = 200 ns

X = ± 5%

blank = ± 10%

Package

F = FDIP28W

C = PLCC32

Temperature Range

1 = 0 to 70 °C

3 = –40 to 125 °C

6 = –40 to 85 °C

Options

TR = Tape & Reel Packing